<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>IE缓存问题</title>
    <style>
        #result{
            width:200px;
            height:100px;
            border:solid 1px #258;
        }
    </style>
</head>
<body>
    <button>点击发送请求</button>
    <div id="result"></div>
    <script>
        const btn = document.getElementsByTagName('button')[0];
        const result = document.querySelector('#result');

        btn.addEventListener('click', function(){
            const xhr = new XMLHttpRequest();
            xhr.open("GET",'http://127.0.0.1:8000/ie?t='+Date.now());
            xhr.send();
            xhr.onreadystatechange = function(){
                if(xhr.readyState === 4){
                    if(xhr.status >= 200 && xhr.status< 300){
                        result.innerHTML = xhr.response;
                    }
                }
            }
        })
    </script>
</body>
</html>